Pump plunger



C. A. DE RIGNE Mar. 13, 1923.

PUMP PLUNGER Filed June 12, 1922 31mm.. E

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Patented Mar. 13, i923.

CHARLES AUGUSTUS RIGNE,

` time OF LOS ANGELES, CALIFORNIA.

PUMP PLUNGER.

1 f Application filed June 12,`

To all whom t may Concern.'

Be it known that I, CHARLES AUGUSTUS Dn RIGNE, a citizen of the UnitedStates, residing at Los Angeles, in the county'of Los Angeles and State of California,fhave in-y vented certain new and useful Improvements in Pump Plungers; and I do declare the fol# lowing to be a full, clear, and exact descrip-` tion of the invention, such as will enable others skilledv in the art to which it appertains to make and use the same. f.

This invention relates to an improved plunger which is especially designed for use in pneumatic pumps of the class used for inflating vehicle tires and the like.v v

The principal object of the invention is to generally improve upon plungers of ythis class by providing one, embodying a head of novel construction, the same being composed of comparatively few and inexpensive parts which are capable of rapid separation in order to make the repairs and replacements whenever necessary.' y f More specifically speaking, it is one of the objects of the invention to provide a plunger head which has a removable sleeve on its lower end formed with a groove with which the hooked free ends of the radial arms of a spring abutment are engaged.

` Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same; y

Figure 1 is a side elevational view of the conventional form of a pneumatic pump with a portion of the cylinder broken away so as to disclose the improved plunger head.

Figure 2 is an enlarged central vertical sectional view through the head showing the details and construction more clearly.

Figure 3 `is a. transverse section taken on line 3 3 of Figure 2.

In the drawings, the letter B designates an air pump barrel or cylinder having a base A at its lower end with a valved flexible conduit C leading from the usual passage in the base which has communication with the cylinder. Slidable in the cylinder is the plunger, comprising a rod R having a head H on its lower end and a handle G on its upper end. y

As before intimated, the invention resides4 in the construction of the head H. By di- 1922. sriaino. 567,645.

` rectingl attentionto Figure 2, the preferred construction ofthe head can be clearly seen.

As here shown, it has detachable threadedk ,connection with the lower end of the .rod and that portion adjacent the connection is formed with the plurality of openings 1 having communication with the upper chamber in the cylinder. Adjacent this'apertured partition 2 and below this "partition it is formed with a reduced externally screw-y threaded part 3 in whichv a eheck'valve 4 is arranged. This valvecooperates with the central port in thepartition 2 and a coiled spring 5 serves tomaintain it closed. As before suggested, it is desirable to provide a .novel anchor or abutment which is to be associated with`the` lower end of the coiled spring. This abutment is generally indicated by the numeral 6 and, in its preferred form, comprises acup 7 in which the lower end of the spring received and a plurality of radial arms 8 which have their outer ends bent to form hooks 9,designed fora reception in a circumferential groove 10` formed at the bottom `of the sleevel `11 'A which is threaded onto the reduced portion of the body as shown. It is to be noted that by reducing the lower portion of the body `as described, a shoulder 12 is formed and packing members 13 are arranged on the reduced part 3 above the upper end of the aforesaid sleeve, said packing members being tightly clamped against the shoulder by means of a nut 14C which is arranged on the reduced portion of the body.

In operatiomit willbe seen that air chambers will be formed above and below the plunger head and the air will be alternately .compressed in the chambers according to the body. The air will then findA its way s through the spaces between the radial arms of the spring abutment and will be forced outwardly through the aforesaid valved flexible conduit C. c Y

From the foregoing description it is manifest that I have devised an extremely novel and practical plunger which is unique, simple in construction, and such as to perinitlthc packing inembers,;or any other do-y tails `which may need to be repaired., to be easily and readily replaced. The con-- struction. isl such as to insure eilectiveness or' operation and to render the plunger inexpensive to both the manufacturer and Vthe user. Other teatures and advantages have also been made clear from the foregoing description. Consequently, by carefully considering the description in connection with the drawings, persons familiar with devices of this class will doubtless be able to obtain an understandingof the invention. There.

tore, a. more lengthy and detailed description is' deemed unnecessary.

-talren as'the preferred embodiment of the Since probably the best results may be ob tained with the construction-and arrange nient hereinl shown and described, this is invention. `However, I wish it to be underk'stood thatr minor changes coming within the scope of the invention as claimed may bev seat adjacent its lower end, a valve element' in the hollow body beneath the valve seat, a spring beneath said valve, and a spring support engaging the lower end of said spring and having mounting means fitting into the annular seat to're'tain the spring support in place.

. 2. A pump pliuigei having a head on its "lower endincluding a body7 having valved Vair passage, being formed at its lower end with a circuinl'erential grooveand a springabutment or anchor .formed with a central cup tor` a reception olf one end of the valve spring and a plurality of radial arms equipped at their outer ends with hooks to engage in said groove.

3.' A pump plunger having a head on vits lower end including a body having an air passage, said head having its lower end poi"- tion provided with an annular seat, a valve for the air passage opening downwardly, a spring carrier including mounting means fitting into said seat, and a spring positioned Abetween thespring carrier and valve for' -y`ieldablyhold1ng the valve in a .raised and closing position.

[A pump plunger having a head on its lower end,said head comprising a body hai ing valved'passage for the air and a reduced externally screw` threaded portion in which the valve is arranged, a sleeveengaged with the screw threaded portion of said body, said sleeve having a circumferential groove formed at its lower end, a valve, a spring for closingthe -vaive, an abutment for the lower end of the spring having a centrally disposed `seat for reception of the-lower end of the spring and supporting arms having hooks at their free ends engaged in said groove, and a packing associated with the head.

In testimony'whereoi l have hereunto set my hand. v CHARLES AUGUSTUS DE PIGNE.

` lllitnesses:

WILLIAM J. PRUssEii, RALPH H. VKnLsnv. 

